we've had to do a similar thing with moving many people's pins. in fact, minus the stairs, 2 friends and I navigated my MET monsters from one end of the house to the other, navigating a narrow hallway with 2 90° turns and an extremely tight door frame.

one thing is to be sure to protect everything. remember the father's adage: "wood doesn't heal, hands do!" we used large pieces of cardboard between the walls and door frame and the pin when things got especially tight just to make sure that neither was being damaged.

ps
it's amazing how much lighter that cabinet becomes once you've removed the glass and the playfield. you're going to need a place to set the playfield (preferably leaning it on it's side (maybe against a bed mattress)

I'm not sure just how easy the playfield is to remove from the hobbit, however in the SAM stern machines, that left side harnesses does not have any molex connectors in the cabinet, so you have to cut about a dozen zip ties and unplug connectors in the back box and then fish everything out of the back box into the cabinet to pull the playfield out.

just remember to plan the amount of time that you think it will take and then double it so that you don't feel rushed. the hobbit weighs in at over 300 lbs (it's probably one of the heaviest machines available to date)

here's a movie my friend (scott freeman) put together of the endevour (he apologies for the choppy sound